docs: update

README.md

@@ -2,11 +2,39 @@
 
 A simple password manager using GPG.
 
+
+## Dependencies
+
+- `bash`
+- `gpg2`
+
+
+## Usage
+
+Examples:
+    - `pash add web/gmail`,
+    - `pash list`,
+    - `pash del google`,
+    - `pash show github`.
+
+```
+pash - simple password manager.
+usage: pash [add|del|show|list] [name] [-n,-q,-c] [-l length]
+
+-n          Limit passwords to alphanumeric characters.
+-l length   Length of generated passwords.
+-c          Copy password to clipboard.
+-q          Don't print password to stdout.
+-h          Print this message.
+-v          Show version.
+```
+
 ## TODO
 
 - [x] Add support for not generating passwords.
 - [x] Add support for categories.
 - [ ] Add an optional `tree` view.
+- [ ] Add support for both `gpg` and `gpg2`.
 - [ ] Man page.
 - [ ] Setup automatic linting.
 - [ ] Documentation.